Related Parties (Schedule Of Related Party Expenses) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Related Party Transaction [Line Items]
Related Party Transaction, Expenses from Transactions with Related Party	$ 0	$ 2,926	$ 3,791
Leasing Agent Fees [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Expenses from Transactions with Related Party	0	16	434
Operation Of Parking Garages [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Expenses from Transactions with Related Party	0	125	111
Building Management Fees [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Expenses from Transactions with Related Party	0	2,342	2,202
Property Construction Management Fees [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Expenses from Transactions with Related Party	0	165	360
Tower's project consulting fees
Related Party Transaction [Line Items]
Related Party Transaction, Expenses from Transactions with Related Party	0	0	419
Dividends Paid On Company Stock Held By Tower [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Expenses from Transactions with Related Party	$ 0	$ 278	$ 265